| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /*------------------------------------------------------------------------- |
| * |
| * predtest.h |
| * prototypes for predtest.c |
| * |
| * Portions Copyright (c) 2005-2009, Greenplum inc |
| * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group |
| * Portions Copyright (c) 1994, Regents of the University of California |
| * |
| * $PostgreSQL: pgsql/src/include/optimizer/predtest.h,v 1.4 2006/03/05 15:58:57 momjian Exp $ |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef PREDTEST_H |
| #define PREDTEST_H |
| |
| #include "nodes/primnodes.h" |
| #include "utils/hsearch.h" |
| #include "utils/memutils.h" |
| |
| extern bool predicate_implied_by(List *predicate_list, |
| List *restrictinfo_list); |
| extern bool predicate_refuted_by(List *predicate_list, |
| List *restrictinfo_list); |
| |
| /*************************************************************************************** |
| * BEGIN functions and structures for determining a set of possible values from a clause |
| */ |
| typedef struct |
| { |
| /** |
| * the set of possible values, if this can be determined from the clause. |
| */ |
| HTAB *set; |
| |
| /** |
| * The memory context that contains the hashtable and its set of possible values |
| */ |
| MemoryContext memoryContext; |
| |
| /** |
| * if true then set should be ignored and instead we know that we don't know anything about the set of values |
| */ |
| bool isAnyValuePossible; |
| } PossibleValueSet; |
| |
| extern PossibleValueSet |
| DeterminePossibleValueSet( Node *clause, Node *variable); |
| |
| /* returns a newly allocated list */ |
| extern Node ** |
| GetPossibleValuesAsArray( PossibleValueSet *pvs, int *numValuesOut ); |
| |
| extern void |
| DeletePossibleValueSetData(PossibleValueSet *pvs); |
| |
| extern void |
| InitPossibleValueSetData(PossibleValueSet *pvs); |
| |
| /** |
| * END functions and structures for determining set of possible values from a clause |
| *********************************************************************************** |
| */ |
| |
| #endif /* PREDTEST_H */ |